<?php
/*******************************************************************************

    Copyright 2007 Whole Foods Co-op

    This file is part of IT CORE.

    IT CORE is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    IT CORE is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    in the file license.txt along with IT CORE; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*********************************************************************************/

namespace COREPOS\pos\parser\preparse;
use COREPOS\pos\parser\PreParser;

class PercentDiscount extends PreParser 
{
    private $remainder;
   
    function check($str)
    {
      if (strstr($str,"DI")) {
         $split = explode("DI",$str);
         if (is_numeric($split[0])){
            $this->remainder = $split[1];
            $this->session->set("itemPD",(int)$split[0]);

            return true;
         }
      } elseif (strpos($str,"PD") > 0) {
         $split = explode("PD",$str);   
         if (is_numeric($split[0]) && strlen($split[1]) > 0){
            $this->remainder = $split[1];
            $this->session->set("itemPD",(int)$split[0]);

            return true;
         }
      }

      return false;
   }

   function parse($str)
   {
      return $this->remainder;
   }

   function doc()
   {
      return "<table cellspacing=0 cellpadding=3 border=1>
         <tr>
            <th>Input</th><th>Result</th>
         </tr>
         <tr>
            <td><i>discount</i>DI<i>item</i></td>
            <td>Set a percent discount <i>discount</i>
            for just one item <i>item</i></td>
         </tr>
         <tr>
            <td><i>discount</i>PD<i>item</i></td>
            <td>Same as DI above</td>
         </tr>
         </table>";
   }
}

